<%@ page import="java.util.ArrayList" %><%--
  Created by IntelliJ IDEA.
  User: WangJun
  Date: 2024/11/7
  Time: 11:29
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>

<%
//String s = null;
//String s = "";
//String s = "真好玩";
ArrayList<Object> s = new ArrayList<>();
s.add("aaa");
request.setAttribute("s", s);

%>
${empty s}<br>
${not empty s}
</body>
</html>
